*{
    padding: 0;
    margin: 0;
}
.site-header{
    width: 100%;
    height: 100px;
    margin-top: 40px;
    background-color: burlywood;
    overflow: hidden;
}
a{
    text-decoration: none;
}
.w{
    width: 1226px;
    height: 100%;
    margin: 0 auto;
    overflow: hidden;
    background-color: rgb(212, 168, 168);
}
.logo{
    width: 62px;
    height: 52px;
    margin-top: 22px;
    float: left;
}
.logo span{
    display: block;
    width: 56px;
    height: 56px;
    font-size: 56px;
    color: orange;
}
.nav{
    width: 850px;
    height: 100px;
    float: left;
}
.nav>ul{
    width: 678px;
    height: 88px;
    list-style-type: none;
    padding: 12px 0 0 172px;
}
.nav>ul>li{
    float: left;
}
.item>a{
    /* line-height: 88px; */
    display: block;
    color: #333;
    font-size: 16px;
    padding: 30px 10px 42px;
}
.item>a:hover{
    color: red;
}
.item-child{
    width: 100%;
    height: 0px;
    /* background-color: pink; */
    position: absolute;
    top: 140px;
    left: 0;
    transition: 0.3s;
    /* display: none; */
    overflow: hidden;
}
.item:hover .item-child{
    height: 286px;
    /* background-color: rgb(127, 209, 20); */
}
.item-child>.w{
    background-color: rgb(127, 209, 20);
}
.item-child ul{
    width: 100%;
    height: 286px;
    overflow: hidden;
}
.item-child li{
    width: 203px;
    height: 286px;
    float: left;
    text-align: center;
    list-style-type: none;
    /* background-color: green; */
}
.none div{
    border: none;
}
.png{
    width: 160px;
    height: 160px;
    font-size: 0;
    margin: auto;
    margin-top: 40px;
    border-right: 1px solid red;
}
.png img{
    width: 160px;
    height: 160px;
}
.item-child h4{
    margin-top: 20px;
    color: #333;
    font-weight: 400;
    font-size: 14px;
}
.item-child p{
    color: blue;
    font-size: 12px;
    margin-top: 8px;
}
.search{
    width: 296px;
    height: 50px;
    margin-top: 25px;
    float: right;
    /* background: yellow; */
    border: 1px solid #e0e0e0;
    overflow: hidden;
}
.search form{
    width: 224px;
    height: 50px;
    float: left;
    margin-left: 20px;
}
.search input{
    /* display: block; */
    width: 100%;
    height: 50px;
    border: 0;
    background-color: rgb(212, 168, 168);
}
.search sapn{
    display: block;
    float: left;
    border-left: 1px solid #e0e0e0;
    /* font-size: 46px; */
}
.search .icon-fangdajing{
    font-size: 46px;
    color: #a2a2a2;
}